Today in Summer of 2021 more shots of an orange long blooming (2nd bloom), perennial flower Cliff maids - Lewisia cotyledon in reflected ultraviolet photography and simulated bee and butterfly vision. All shots were done at f11 in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulated bee and butterfly vision. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was Xenon light from my UV enhanced studio flash.
[click on image to see a larger one]
Simulated butterfly vision:
Simulated bee vision:
Quadriptych of human vision, UV, simulated butterfly and bee vision (left to right, top to bottom):
Lewisia has a visible UV pattern, its petal tips are UV bright around 385nm, its center is UV dark, so this gets quite nicely visible, also in simulated butterfly and bee vision.
But there is also a reflecting ring visible, formed by those shiny petals which is especially visible in UV! This has recently been discovered by Prof. (em) Klaus Lunau of the University of Duesseldorf, Germany and he has published about that in NATURE 2020 here: Lunau, K., Ren, ZX., Fan, XQ. et al. Nectar mimicry: a new phenomenon. Sci Rep 10, 7039 (2020). https://www.nature.com/articles/s41598-020-63997-3
I have written more about that flower HERE
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos